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A disc with a large moment of inertia fitted to an engine is called a:
AFreewheel
BFlowmeter
CFramework
DFlywheel
Answer & Solution
Correct answer: D. Flywheel
1. Engines deliver power unevenly across a cycle.
2. A heavy rotating disc smooths that out.
3. Machines producing rotational motion have a disc with a large moment of inertia called a flywheel.
4. So the answer is a flywheel.
_Source: NCERT Class XI Physics Part I, Ch 6 'Systems of Particles and Rotational Motion'_
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